Using e(+)e(-) annihilation data collected by the CLEO II detector at
CESR, we have observed the decay D-s(+)-->omega pi(+). This final stat
e may be produced through the annihilation decay df the D-s(+), or thr
ough final state interactions. We find a branching ratio of Gamma(D-s(
+)-->omega pi(+))/Gamma(D-s(+)-->eta pi(+)) = 0.16+/-0.04+/-0.03, wher
e the first error is statistical and the second is systematic.